y
ffmpeg -f concat -safe 0 -i list.txt -map 0:v -map 0:a -c copy output.mp4
ffmpeg -i in1.mp4 -i in2.mp4 -filter_complex "[0:v][0:a][1:v][1:a]concat=n=2:v=1:a=1[v][a]" -map "[v]" -map "[a]" output.mp4

v
ffprobe -hide_banner -i filename.mp4
ffprobe -v error -select_streams v:0 -show_entries stream=width,height -of csv=p=0 filename.mp4
ffprobe -v error -select_streams v:0 -show_entries stream=width,height -of default=noprint_wrappers=1 filename.mp4
ffprobe -v error -select_streams v:0 -show_entries stream=bit_rate -of csv=p=0 filename.mp4
ffmpeg -i filename.mp4
